The colorful effect is due to the diatom's silica cell wall, which encases the organism like a glassy shell.
它的五颜六色效果是由于硅藻的像玻璃外壳包围着机体的二氧化硅细胞壁。
The technical requirements for the lost pattern made from the paraffin-stearin and the shell mould made from colloidal silica in the precision casting were introduced.
介绍用石蜡-硬脂酸低温模料制作熔模，用硅溶胶作粘结剂制造模壳的工艺。
By repeating technological tests and batch production tests for over a year, the fused silica was successfully used in the production of silica sol shell for low temperature wax precision casting.
经过反复的工艺试验及一年多批量生产验证，成功地将熔融石英应用于精铸用低温蜡—硅溶胶型壳生产中。
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